User can't add repositories through GraphQL API

Created by: dadlerj

• Sourcegraph version:
• Platform information:

Steps to reproduce:

A user reported that using our API to add repositories wasn't working for them. They tried the following mutation:

mutation{
configurationMutation(input: {subject: "VXNlcjox", lastID: 1}) {
overwriteConfiguration(contents: "repos.list:[{url:file:///var/opt/sourcegraph/repos/gerrit/proctool/jenkins-jobs, path:jenkins-jobs}]") {
empty {
alwaysNil
}
}
}
}

They indicated that they got this by copying the mutation done in graphqlbackend/configuration_test.go

The documentation indicated to them, regarding the AddRepository migration:

"To add arbitrary repositories (that don't need to reside on an already configured code host), use the site configuration "repos.list" property."

They also tried this query, but got no response:

mutation{
configurationMutation(input: {subject: "VXNlcjox", lastID: 6}) {
editConfiguration(edit : {keyPath: [{property: "repos.list"}], 
value: "bla"}) {
empty {
alwaysNil
} 
}
}
}